Java使用TCP實現(xiàn)在線聊天的示例代碼

更新時間：2020年01月03日 15:15:36 作者：小矮多

這篇文章主要介紹了Java使用TCP實現(xiàn)在線聊天的示例代碼，文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值，需要的朋友們下面隨著小編來一起學習學習吧

客戶端的代碼：

package tcp.http;

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class Client{
public static void main(String[] args) throws IOException{
Scanner scanner=new Scanner(System.in);
//1.創(chuàng)建Socket
Socket tcpClientSocket=new Socket();
//2.TCP要發(fā)送消息，必須先建立連接
byte[] IPv4={127,0,0,1};  //連接到本機
InetAddress serverAddress=InetAddress.getByAddress(IPv4);
SocketAddress serverSocketAddress=new InetSocketAddress(serverAddress,7777);
tcpClientSocket.connect(serverSocketAddress);//連接上了，（連接過程代碼比較長，但是沒有什么復雜的，只需要查文檔根據(jù)函數(shù)的構(gòu)造過程，一步步來寫就好了）

while(true){ //寫個死循環(huán)來聊天
String request=scanner.nextLine();
//通過字節(jié)流寫入請求
OutputStream os=tcpClientSocket.getOutputStream();
//通過打印流打印和寫入
PrintStream out=new PrintStream(os,true,"UTF-8");
out.println(request);
//通過字節(jié)流讀取響應
InputStream is=tcpClientSocket.getInputStream();
BufferedReader reader=new BufferedReader(new InputStreamReader(is,"UTF-8")); //通過readLine()來保證每次都能把一句完整的話讀完（\r\n是標志）;
String response=reader.readLine();
System.out.println("      "+response);
}
//tcpClientSocket.close();
}
}

服務器端的代碼：

package tcp.threads;

import java.io.*;
import java.net.*;
import java.util.Scanner;
import java.util.concurrent.*;

public class Server{

private static class TalkRunnable implements Runnable{ //一個個的工作線程
private Socket clientSocket;
TalkRunnable(Socket socket){
this.clientSocket=socket;
}
@Override
public void run(){
try{
InetAddress clientAddress=clientSocket.getInetAddress();
int clientPort=clientSocket.getPort();
System.out.printf("ID為 %s:%d 的好友上線了%n",clientAddress.getHostAddress(),clientPort);
//獲取字節(jié)流
InputStream is=null;
is=clientSocket.getInputStream();
//字節(jié)流轉(zhuǎn)換為字符流
InputStreamReader 
isReader=null;
isReader=new InputStreamReader(is,"UTF-8");
//獲取輸出字節(jié)流
OutputStream os=clientSocket.getOutputStream();
//獲取打印流
PrintStream out=new PrintStream(os,true,"UTF-8");
//獲取緩沖字符流
BufferedReader reader=new BufferedReader(isReader);
while(true){ //死循環(huán)聊天
String line=reader.readLine();
System.out.println("      好友說："+line);
Scanner scanner=new Scanner(System.in);
String response=scanner.nextLine();
out.println(response);
}
}catch(IOException e){
e.printStackTrace();
}
}
}

public static void main(String[] args) throws IOException{
//監(jiān)聽連接
ServerSocket tcpServerSocket=new ServerSocket(7777);
//定義阻塞隊列
BlockingQueue<Runnable> queue=new LinkedBlockingQueue<>();
//創(chuàng)建線程池
ExecutorService pool=new ThreadPoolExecutor(100,100,0,TimeUnit.MILLISECONDS,queue);

while(true){
//TCP 要發(fā)送消息必須先建立連接
Socket clientSocket=tcpServerSocket.accept();
pool.execute(new TalkRunnable(clientSocket));//有一個客戶端連接到服務器，就起一個線程來專門處理這個對話
}
}
}

運行結(jié)果：